CN205091190U - Cement base fine aggregate cementitious material bonds and draws test fixture - Google Patents
Cement base fine aggregate cementitious material bonds and draws test fixture Download PDFInfo
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- CN205091190U CN205091190U CN201520716387.0U CN201520716387U CN205091190U CN 205091190 U CN205091190 U CN 205091190U CN 201520716387 U CN201520716387 U CN 201520716387U CN 205091190 U CN205091190 U CN 205091190U
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Abstract
The utility model discloses a cement base fine aggregate cementitious material bonds and draws test fixture, square knot barrel including detaining a section of thick bamboo lateral wall, establish at a square knot bobbin top board of detaining section of thick bamboo lateral wall top, knot bobbin top board central authorities be provided with and draw the bolt hole, the knot section of thick bamboo lateral wall that corresponds of square knot barrel both sides on respectively be provided with a pair of foxtail hole, biography power foxtail be diameter 10mm, and one end is described for the cross section reduces. The utility model discloses draw test fixture and forming die with the cement base fine aggregate gelatinization material knot that SJ -10 or SHJ -40 type facing brick bondd and the cooperation of concrete intensity detection appearance is used: has reduced conventional cement mortar and has bondd and to draw experimental stress concentration and phenomenon, assurance test progress that the discreteness is big, to improve work efficiency, and alleviateed intensity of labour, pollution -free, cost also very reduces, can be used to the test with engineering scene matrix material surface bonding intensity to cement base fine aggregate cementitious material simultaneously to not appearing in the same way in the process of the test, shear failure takes place for the test piece.
Description
Technical field
The utility model relates to building materials bonding drag performance test apparatus field, is specially a kind of drawing test clamp being mainly used in testing Adhesive Tensile Performance of Young between cement based fine aggregate Binder Materials and matrix material.
Background technology
Sand-cement slurry be a kind of conventional operation levelling, wipe one's face, build by laying bricks or stones and unstructuredness supporting material, pea gravel concreten is widespread use in the damaged reinforcement of the reinforcing bar closeer key position (as joint cores) of configuration and structural elements then, and the adhesive property of itself and matrix material is one of key index determining its effect quality.And the method adopted when the different adhesive property of research institution to cement based fine aggregate Binder Materials is tested at present exists larger difference, between different modes, lack comparability both at home and abroad.Domestic different testing regulations also has different regulations to the Test about Bond Strength of mortar.Have that discreteness is large, inefficiency, labour intensity are large, cost is high, lack the problems such as comparability, number of patent application be 201010101555.7 appearance solve the problems referred to above very dexterously.
Document 1: Zhang Qiming, Xu Hongtao etc. sand-cement slurry coheres test fixture and mould Developing Application [J]. Zhengzhou: people the Yellow River, 2010, (11): 100-103.For document 2: buy refined virtue, Wu Huaiguo, Gao Fulong etc. power industry Hydroelectric Project Construction technical committee for standardization (TCST) .DL/T5193-2004 " epoxy resin mortar code " [S], 2004, and domestic different research institution and scholar are when testing mortar bond performance, there is larger difference in the test method adopted, and the shortcoming such as labour intensity is large, inefficiency, test period are long, design and produce a set of sand-cement slurry and cohere drawing test clamp and mould solves the problems referred to above dexterously.This as shown in Figure 1, Figure 2 and Figure 3, fixture contains fixture ring, the center of described fixture ring upper surface is provided with bolt hole, the annulus wall of shown fixture ring is provided with axis being parallel and two pin holes on a surface level, is provided with pin in two described pin holes.As shown in Figure 3, Figure 4, this mould contains forming ring and hoop, described forming ring is made up of two semicircular ring steel parts, and the interface of described two semicircular ring steel parts is respectively arranged with contraposition draw-in groove, the inwall of described two semicircular ring steel parts is respectively arranged with a grooving pipe fitting; Described hoop is two halves formula structure, and its interface is respectively arranged with pin hole sheet, and pin hole sheet corresponding is up and down plugged in together by pin, and described hoop is fixed on the annulus lateral surface of described forming ring.
But found by the experimental study in later stage, when adopting 201010101555.7 cement mortar bonding pull-out test clamps and mould to carry out drawing, there is the failed test of some, mainly during drawing, the evagination crescent moon ear of pulling capacity is born by root shear failure in test specimen both sides by pin, and obtains the cohesive strength at non-caked interface.Can be seen by above-mentioned analysis, have in early stage cement based fine aggregate Binder Materials adhesion test that stress is concentrated, discreteness is large, inefficiency, labour intensity are large, cost is high, lack comparability and directly cannot carry out scene and to bond the problems such as pull-out test, can tentatively be solved by the drawing fixture of document 1, but this cover drawing fixture cannot record cohesive strength in use process problem because of test specimen generation shear failure is also urgently to be resolved hurrily.
Summary of the invention
In order to overcome above-mentioned deficiency of the prior art, the utility model provide a kind of bond with SJ-10 or SHJ-40 type tapestry brick and concrete strength inspection instrument with the use of cement based fine aggregate Binder Materials bonding pull-out test clamp and mould, reduce traditional cements mortar bonding pull-out test stress and concentrate the phenomenon large with discreteness, warranty test progress, increase work efficiency, and alleviate labour intensity, pollution-free, cost also greatly reduces, can be used for the test to cement based fine aggregate Binder Materials and engineering site substrate material surface cohesive strength simultaneously, and in process of the test, do not have the routine test specimen of appearance one to be that shear failure occurs.
The purpose of this utility model is achieved in that
Cement based fine aggregate Binder Materials bonding pull-out test clamp, described drawing test clamp comprises the square button cylindrical shell of steel, and two piece power transmission pins matching used with square button cylindrical shell;
Described square button cylindrical shell comprises button cylinder sidewall 2, and to be located at above button cylinder sidewall 2 square buckles cylinder top board 1, and described button cylinder ceiling center is provided with drawing bolt hole 3; The button cylinder sidewall 2 that described square button cylindrical shell both sides are corresponding is respectively provided with pair of pin keyhole 4;
Described power transmission pin is diameter 10mm, and one end is cross section reduction shape.
Positive beneficial effect: the utility model and SJ-10 or SHJ-40 type tapestry brick bond and concrete strength inspection instrument with the use of cement based fine aggregate Binder Materials bonding pull-out test clamp and mould, reduce traditional cements mortar bonding pull-out test stress and concentrate the phenomenon large with discreteness, warranty test progress, increase work efficiency, and alleviate labour intensity, pollution-free, cost also greatly reduces, can be used for the test to cement based fine aggregate Binder Materials and engineering site substrate material surface cohesive strength simultaneously, and in process of the test, do not have the routine test specimen of appearance one to be that shear failure occurs.
Accompanying drawing explanation
Fig. 1 is the button cylinder elevation drawing of prior art;
Fig. 2 is the button cylinder planimetric map of prior art;
Fig. 3 is the mould planimetric map of prior art;
Fig. 4 is the mould elevation drawing of prior art;
Fig. 5 is button cylinder planimetric map of the present utility model;
Fig. 6 is that button cylinder 1-1 of the present utility model is to cut-open view;
Fig. 7 is pin structural representation;
Fig. 8 is mould planimetric map of the present utility model;
Fig. 9 is mould elevation drawing of the present utility model;
In figure be: square button cylinder top board 1, buckle cylinder sidewall 2, drawing bolt hole 3, pin hole 4, grooved steel part 5, become channel bar 6, ear wall 7, peg hole sheet 8, peg 9, wallboard interface 10.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further:
Cement based fine aggregate Binder Materials bonding pull-out test clamp and mould thereof, comprise drawing test clamp and mould, and described drawing test clamp comprises the square button cylindrical shell of steel, and two piece power transmission pins matching used with square button cylindrical shell; Described mould is square mould, and comprise two symmetrical grooved steel parts 5 fastened, the fastening place of described grooved steel part 5 is provided with ear wall 7, ear wall 7 is provided with peg hole sheet 8, peg 9 is interspersed with in described peg hole sheet 8, as shown in Figure 8, Figure 9;
As described in Fig. 5, Fig. 6, described square button cylindrical shell comprises button cylinder sidewall 2, and to be located at above button cylinder sidewall 2 square buckles cylinder top board 1, and described button cylinder ceiling center is provided with drawing bolt hole 3; The button cylinder sidewall 2 that described square button cylindrical shell both sides are corresponding is respectively provided with pair of pin keyhole 4;
As shown in Figure 7, described power transmission pin is diameter 10mm, and one end is cross section reduction shape;
As shown in Figure 9, the both sides of described two the symmetrical grooved steel parts 5 fastened are respectively arranged with into channel bar 6; The wallboard interface 10 of two symmetrical grooved steel parts 5 fastened is faulting of slab ends structure fastening.
Theoretical analysis: by the analysis to part test failure cause when employing 201010101555.7 cement mortar bonding pull-out test clamp and mould, find that this cover drawing fixture profile feature is the very crux of problem: columned configuration design makes evagination crescent moon basal part of the ear portion shear surface be weakened largely (the corresponding chord length of less central angle is shorter), occurs the situation of shear resistance × shear area < cohesive strength × bond area.Therefore, the key of head it off how to determine suitable Specimen Shape and size, makes shear resistance × shear area > cohesive strength × bond area.Found by Test and Comparison Study, adopt square-section test specimen can avoid being subject to the weakening of length of shear plane, the upper open height of suitable increase test specimen, thus the height increased by the face of cutting, thus meet the condition of shear resistance × shear area > cohesive strength × bond area to a greater degree, guarantee the success ratio of drawing adhesion test.
Embodiment
Mainly be divided into two steps: one is the shaping of cement based fine aggregate Binder Materials bonding testing piece, assemble after smearing release agent inside mould, be put in and carry out surface-treated substrate material surface, secondary cement based fine aggregate Binder Materials good for mixing is divided to inject shaping mould, plug and pound closely knit with the rod iron that diameter is 6-8mm, carry out surface afterwards floating, often group is no less than three, form removal after 24h (extracts both sides pin, by shaping die trial, both sides are horizontally separated to the left and right gently), maintenance carries out bonding pull-out test to test the length of time.Two is adopt SJ-10 or SHJ-40 type tapestry brick bonding and concrete strength inspection instrument and this drawing fixture to test.Be buckled on cement mortar specimen after button cylinder is taken out pin, both sides pin is inserted and is stuck in the grooves on two sides of test specimen to be measured, with the bolt of SJ-10 or SHJ-40 type tapestry brick bonding and concrete strength inspection instrument with buckle cylinder and is connected, start SJ-10 or SHJ-40 type tapestry brick and to bond and concrete strength inspection instrument carries out the test of cohesive force.
Bonding drawing fixture application example
The cohesive strength of this fixture to sand-cement slurry and concrete surface is adopted to carry out experimental study.Having carried out altogether organizing number is the orthogonal test of 16, and often organize test number (TN) 3 times, its measured value represents as follows: (in table, volume unit is MPa)
In process of the test, do not have the routine test specimen of appearance one to be that shear failure occurs.In his-and-hers watches, data calculate and know, in the intensity level of each group of three test specimens and its group the difference of mean value except the 3rd, 5,7,16 group all in it is organized mean value 15% within, and the 3rd, 5,16 in these three groups, often organize only have the difference of mean value in the intensity level of a test specimen and its group be greater than its organize in mean value 15%, meet the requirement of the test findings validity of document ［ 3 ］ defined, only have the 7th group have the difference of mean value in the intensity level of two test specimens and its group be greater than its organize in mean value 15%, invalid test group should be considered as.
The utility model and SJ-10 or SHJ-40 type tapestry brick bond and concrete strength inspection instrument with the use of cement based fine aggregate Binder Materials bonding pull-out test clamp and mould, reduce traditional cements mortar bonding pull-out test stress and concentrate the phenomenon large with discreteness, warranty test progress, increase work efficiency, and alleviate labour intensity, pollution-free, cost also greatly reduces, can be used for the test to cement based fine aggregate Binder Materials and engineering site substrate material surface cohesive strength simultaneously, and in process of the test, do not have the routine test specimen of appearance one to be that shear failure occurs.
The above, it is only preferred embodiments of the present utility model, not any pro forma restriction is done to the utility model, every any simple amendment above example done according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (3)
1. cement based fine aggregate Binder Materials bonding pull-out test clamp, is characterized in that: described drawing test clamp comprises the square button cylindrical shell of steel, and two piece power transmission pins matching used with square button cylindrical shell.
2. cement based fine aggregate Binder Materials bonding pull-out test clamp according to claim 1, it is characterized in that: described square button cylindrical shell comprises button cylinder sidewall (2), be located at the square of button cylinder sidewall (2) top and buckle cylinder top board (1), described button cylinder ceiling center is provided with drawing bolt hole (3); The button cylinder sidewall (2) that described square button cylindrical shell both sides are corresponding is respectively provided with pair of pin keyhole (4).
3. cement based fine aggregate Binder Materials bonding pull-out test clamp according to claim 1, it is characterized in that: described power transmission pin is diameter 10mm, and one end is cross section reduction shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520716387.0U CN205091190U (en) | 2015-09-16 | 2015-09-16 | Cement base fine aggregate cementitious material bonds and draws test fixture |
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| CN201520716387.0U CN205091190U (en) | 2015-09-16 | 2015-09-16 | Cement base fine aggregate cementitious material bonds and draws test fixture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254267A (en) * | 2018-04-23 | 2018-07-06 | 深圳市仟亿建筑技术有限公司 | There are skin anti-shear concrete strength test test specimen, testing equipment and test method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254267A (en) * | 2018-04-23 | 2018-07-06 | 深圳市仟亿建筑技术有限公司 | There are skin anti-shear concrete strength test test specimen, testing equipment and test method |
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